UVA383 Shipping Routes

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=5&page=show_problem&problem=319 [PDF](https://uva.onlinejudge.org/external/3/p383.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA383/eb6ce1e0383b3350c5cca09f8ac5dc1282f82df8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA383/119dd23b59e2eac581d62504addcf273a36d780e.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA383/894fe3a98f4d6157f140586cdda6371dd9cc0c61.png)